How much does it cost to fix Halstead error code 35?

Typical repair cost for the Halstead 35 fault is £150-350 including labour.

35 High

Halstead 35 Fault Code

Q: What does the Halstead 35 fault code mean?

Your boiler's internal computer brain cannot communicate with its plug-in configuration chip, meaning the system won't fire up for heating or hot water.

The Halstead 35 fault code means: your boiler's internal computer brain cannot communicate with its plug-in configuration chip, meaning the system won't fire up for heating or hot water.. It appears on 8 Halstead models in our database.

Technical description: BCC Error/ No flame. Incorrect/missing BCC (BCC’s only fitted to replacement PCB’s)

Typical repair cost £150-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Halstead models that show the 35 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Halstead 35 fault code information on this page is sourced and cross-checked against the official Halstead service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026